/*
 * FreeRTOS Kernel <DEVELOPMENT BRANCH>
 * Copyright (C) 2021 Amazon.com, Inc. or its affiliates.  All Rights Reserved.
 *
 * SPDX-License-Identifier: MIT
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy of
 * this software and associated documentation files (the "Software"), to deal in
 * the Software without restriction, including without limitation the rights to
 * use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of
 * the Software, and to permit persons to whom the Software is furnished to do so,
 * subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * https://www.FreeRTOS.org
 * https://github.com/FreeRTOS
 *
 */

/* THIS SAMPLE CODE IS PROVIDED AS IS AND IS SUBJECT TO ALTERATIONS. FUJITSU */
/* MICROELECTRONICS ACCEPTS NO RESPONSIBILITY OR LIABILITY FOR ANY ERRORS OR */
/* ELIGIBILITY FOR ANY PURPOSES.                                             */
/*                 (C) Fujitsu Microelectronics Europe GmbH                  */

/*---------------------------------------------------------------------------
 * __STD_LIB_sbrk.C
 * - Used by heap_3.c for memory allocation and deletion.
 *
 * /*---------------------------------------------------------------------------*/

#include "FreeRTOSConfig.h"
#include <stdlib.h>

static long brk_siz = 0;
typedef int _heep_t;
#define ROUNDUP( s )    ( ( ( s ) + sizeof( _heep_t ) - 1 ) & ~( sizeof( _heep_t ) - 1 ) )
static _heep_t _heep[ ROUNDUP( configTOTAL_HEAP_SIZE ) / sizeof( _heep_t ) ];
#define              _heep_size    ROUNDUP( configTOTAL_HEAP_SIZE )

extern char * sbrk( int size )
{
    if( ( brk_siz + size > _heep_size ) || ( brk_siz + size < 0 ) )
    {
        return( ( char * ) -1 );
    }

    brk_siz += size;
    return( ( char * ) _heep + brk_siz - size );
}
